[U-Boot] [PATCH 2/2][v2] Add readme of how to boot from espi flash for p4080ds.

[Scott Wood]

On Wed, 17 Nov 2010 03:25:05 -0700
"Xie Shaohui-B21989" <B21989 at freescale.com> wrote:

> From: Wood Scott-B07421 
> Sent: Wednesday, November 17, 2010 5:55 AM
> To: Wolfgang Denk
> Cc: Xie Shaohui-B21989; u-boot at lists.denx.de; Gala Kumar-B11780
> Subject: Re: [U-Boot] [PATCH 2/2][v2] Add readme of how to boot from
> espi flash for p4080ds.
> 
>  
> Yes, a simple C tool to take an existing PBL or RCW dump and "espi-ize"
> it into a PBL dump would be nice.  The user will still need to acquire
> the existing RCW manually.  This only needs to be done once on a board;
> it's not part of building a U-Boot image.
> 
> 
> 
> 
> [Xie Shaohui] A simple C tool will make things more complex, the
> pbl_image_tool does the same thing

It doesn't do the same thing for poeple who don't have access to it.

Plus, requiring the user to do a bunch of manual stuff is not "the same
thing" as something more automated.

More work for us upfront is not the same as "more complex".

> and it is irreplaceable,

Tell that to the people trying to replace it with some big
Eclipse-based thing. :-)

> something like RCW has to be produced manually, and because there is no
> near-universal default RCW, this README took a basic assumption that
> user already can boot from NOR flash, so user can reuse the RCW dump of
> NOR u-boot with change "PBI_SRC" and "BOOT_LOC" only.

Yes.  But once the user provides an RCW, everything else should be
automatable.

-Scott